An unexpected discovery.
Lohse
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D002379:Catalogs, Commercial as Topic; D003748:Dental Equipment / Q000266:history*; D003762:Dental Instruments / Q000266:history; D003764:Dental Materials / Q000266:history*; D005858:Germany; D049672:History, 19th Century; D014481:United States
D003764:Dental Materials